Accept, or Drop Ethernet Frames with Specific Protocols

Important - In a Cluster Two or more Security Gateways that work together in a redundant configuration - High Availability, or Load Sharing., you must configure all the Cluster Members in the same way.

By default, Security Gateway Dedicated Check Point server that runs Check Point software to inspect traffic and enforce Security Policies for connected network resources. and Cluster in Bridge mode Security Gateway or Virtual System that works as a Layer 2 bridge device for easy deployment in an existing topology. allows Ethernet frames that carry protocols other than IPv4 (0x0800), IPv6 (0x86DD), or ARP (0x0806) protocols.

Administrator can configure a Security Gateway and Cluster in Bridge Mode to either accept, or drop Ethernet frames that carry specific protocols.

When Access Mode VLAN (VLAN translation) is configured, BPDU frames can arrive with the wrong VLAN number to the switch ports through the Bridge interface. This mismatch can cause the switch ports to enter blocking mode.

In Active/Standby Bridge Mode only, you can disable BPDU forwarding to avoid such blocking mode:

Step	Instructions
1	Connect to the command line on the Security Gateway (each Cluster Member Security Gateway that is part of a cluster.).
2	Log in to the Expert mode.
3	Backup the current /etc/rc.d/init.d/network file: cp -v /etc/rc.d/init.d/network{,_BKP}
4	Edit the current /etc/rc.d/init.d/network file: vi /etc/rc.d/init.d/network
5	After the line: ./etc/init.d/functions Add this line: /sbin/sysctl -w net.bridge.bpdu_forwarding=0
6	Save the changes in the file and exit the Vi editor.
7	Reboot the Security Gateway (each Cluster Member).
8	Make sure the new configuration is loaded: sysctl net.bridge.bpdu_forwarding The output must show: net.bridge.bpdu_forwarding = 0